Citation:
M Zarrelli, A.A Skordos, I.K Partridge; Toward a constitutive model for cure-dependent modulus of a high temperature
epoxy during the cure, European Polymer Journal, Volume 46, Issue 8, August 2010, Pages 1705-1712
Abstract:
A constitutive model, based on Kohlrausch-Williams-Watts (KWW) equations, was
developed to simulate the evolution of the dynamic relaxation modulus during the
cure of a "high temperature' epoxy. The basic assumption of the modelling
methodology proposed is the equivalence of the mechanisms underlying the
evolution of the glass transition temperature and the relaxation time shift
during the cure, leading to the use of a common potential function. This
assumption is verified by the comparison of normalized glass transition data and
principal relaxation times, which have been found to follow a single master
curve. Results show satisfactory agreement between experimental data and model
prediction over the range of chemical conversion considered.